EPS-1475: PHP Security Audit - UAE Lite #1263
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| "phpcompatibility/phpcompatibility-wp": "*", | ||
| "automattic/vipwpcs": "^2.3", | ||
| "phpstan/phpstan": "^1.11", | ||
| "php-stubs/generator": "^0.8.4", |
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What: Consider validating that the added dependency does not introduce vulnerabilities.
Why: It's essential to ensure that any new dependencies are not only necessary but also safe and secure as they can lead to security issues in the project if they have known vulnerabilities.
How: Check the security advisories for pheromone/phpcs-security-audit on platforms like Packagist or GitHub, and ensure that it adheres to best practices for security. Also, consider implementing lock files in Composer to protect against unexpected updates.
| "wp-coding-standards/wpcs": "^2.3", | ||
| "phpcompatibility/phpcompatibility-wp": "*", | ||
| "automattic/vipwpcs": "^2.3", | ||
| "phpstan/phpstan": "^1.11", |
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What: Ensure the new dependency is compatible with existing packages and does not introduce conflicts.
Why: Compatibility is critical for maintaining project stability, and conflicts in package versions can lead to issues that negatively impact your application's functionality or security.
How: Consider running composer update after adding the new dependency to check for conflicts and use composer why-not <package> to identify any dependencies that are not compatible.
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What: The use of preg_replace_callback() for stripping PHP tags appears to be unnecessary and inefficient since the replacement is static (always returns an empty string).
Why: Using preg_replace() is more straightforward and performs better when the replacement logic doesn't depend on the matched content. The callback function in preg_replace_callback() incurs extra overhead, which isn't required here and could impact performance, especially if this function is called frequently with large input.
How: Consider reverting back to preg_replace() for the PHP tags replacement lines, and also check other cases where preg_replace_callback() is used for efficiency.
| $content = preg_replace_callback( '/<\?(.*)\?>/Us', function() { return ''; }, $content ); | ||
| $content = preg_replace_callback( '/<\%(.*)\%>/Us', function() { return ''; }, $content ); | ||
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| if ( ( false !== strpos( $content, '<?' ) ) || ( false !== strpos( $content, '<%' ) ) ) { |
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What: The logic for stripping comments using preg_replace_callback() could also be simplified for performance gains.
Why: As with stripping PHP tags, the static replacement in comments does not necessitate the use of a callback, which adds unnecessary complexity and overhead.
How: Replace occurrences of preg_replace_callback() for comment stripping with preg_replace() for better readability and efficiency.
| $content = preg_replace( '/\/\*(.*)\*\//Us', '', $content ); | ||
| $content = preg_replace_callback( '/<!--(.*)-->/Us', function() { return ''; }, $content ); | ||
| $content = preg_replace_callback( '/\/\*(.*)\*\//Us', function() { return ''; }, $content ); | ||
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What: Using preg_replace_callback() to strip line breaks may not be the best approach; this could lead to performance issues.
Why: The callback function is unnecessary, complicating what could be a simple regex replacement, especially since you're just replacing line breaks with an empty string.
How: Switch back to preg_replace('/\r|\n/', '', $content); for clarity and performance.
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| if ( ( false !== strpos( $content, '<?' ) ) || ( false !== strpos( $content, '<%' ) ) ) { | ||
| return ''; | ||
| } |
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What: Ensure that the security implications of SVG sanitization are thoroughly tested, especially after refactoring sanitization methods.
Why: SVG content can carry security risks if not properly sanitized, such as XSS attacks when SVG files are manipulated. The new approach must be validated to ensure it adequately protects against these vulnerabilities.
How: Conduct thorough testing of SVG inputs including edge cases and malicious SVG attempts to ensure that outputs do not contain any harmful code.
| $class_to_load = str_replace( __NAMESPACE__ . '\\', '', $class ); | ||
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| if ( ! class_exists( $class_to_load ) && ! class_exists( $class ) ) { | ||
| $filename = strtolower( |
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What: The use of preg_replace_callback here is a good choice for handling complex string replacements, but be cautious about performance implications if the class name patterns become very complex or the number of classes to load increases significantly.
Why: Performance is critical in a class autoloading mechanism, as it can be invoked frequently. Even minor inefficiencies can compound. While the current use of preg_replace_callback seems fine, it's important to ensure that it does not introduce a bottleneck as the code scales.
How: Review the performance by conducting load testing on the autoloading process. Monitor how often it gets called and how it performs with a larger codebase. If any performance issues arise, consider profiling the code to identify slow patterns and optimize regex operations.
| if ( ! class_exists( $class_to_load ) && ! class_exists( $class ) ) { | ||
| $filename = strtolower( | ||
| preg_replace( | ||
| preg_replace_callback( |
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What: Make sure to implement proper error handling for the regex operations if they fail or produce unexpected outputs, as this could lead to issues during the class loading.
Why: Robust error handling is essential to avoid silent failures that can create harder to trace bugs and security issues. If a class name does not correctly match expectations, it could lead to load failures.
How: Consider adding a check after the regex to validate the output before using it, maybe by ensuring that the resulting filename conforms to a set naming convention expected for your autoloaded classes.
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Description
Main Purpose: This pull request addresses PHP security best practices by integrating security auditing tools and improving existing code sanitization mechanisms, enhancing the security posture of the project.
Key Changes:
pheromone/phpcs-security-audittocomposer.json, allowing for automated security audits in the codebase.sanitize_svg()function inclass-hfe-settings-page.phpto utilizepreg_replace_callback()for better performance and readability while stripping unwanted tags and comments from SVG content.autoload()method inclass-widgets-loader.phpto also usepreg_replace_callback()for more complex pattern matching when transforming class names.Additional Notes:
composer installto ensure all dependencies are current. Reviewers should validate that the audit tool integrates correctly with existing development workflows.Screenshots
Types of changes
How has this been tested?
Checklist: